(4,120) diubah koordinat cartesius

(4,120°) kuadran 2
X= r cos ∅
= 4. Cos120°
= 4. Cos (180-120)
= 4. Cos 60°
= 4×½
= -2
Kw2 cos = -

Y= r sin ∅
= 4. Sin 60°
= 4.½√3
= 2√3

P(-2,2√3)

Selamat mengerjakan ^^